Total bridges
220
Public highway bridges in Winn County
County profile · official public datasets
Winn County, LA
220 public highway bridges tracked in the FHWA National Bridge Inventory: 55.5% rated Good, 28.2% Fair, 16.4% Poor.
- 220
- Public bridges
- 55.5%
- Good condition
- 16.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Winn County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- 51st
- of 64 on Poor share
- 16.4%
- Poor-condition share
- 220
- public highway bridges
- 1987
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Winn County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Winn County ranks #51 of 64 Louisiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 16.4%). Winn County, Louisiana contains 220 public highway bridges. Roughly 55.5% are rated “Good,” 28.2% “Fair,” and 16.4% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
55.5%
122 of 220 rated 7-9
Fair condition
28.2%
62 of 220 rated 5-6
Poor condition
16.4%
36 of 220 rated 4 or below
In-state Poor-share rank
#51 of 64
Among Louisiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 220 NBI-tracked bridges by lowest applicable component rating.
Good 55.5% (122)
Fair 28.2% (62)
Poor 16.4% (36)
Winn County's Poor-condition bridges carry 30,306 vehicle crossings a day
That is 9.2% of the county's reported daily bridge traffic on 16.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 842 crossings a day against 1,814 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 220 of 220 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
26.8% of Winn County's bridges have passed the 50-year mark
59 of the 220 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 55.5% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 16.9% of the county's Poor-condition bridge traffic
US0167 over KCS RR, built 1976, carries 5,107 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 36-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 30,306 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Winn County's bridges were built
220 bridges with a recorded construction year, grouped by decade
- 1920s 4
1920–1929
4 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s 15
1950–1959
15 bridges
- 1960s
1960–1969
26 bridges
- 1970s
1970–1979
22 bridges
- 1980s
1980–1989
36 bridges
- 1990s
1990–1999
49 bridges
- 2000s
2000–2009
33 bridges
- 2010s
2010–2019
28 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 1990s, when 49 of the county's bridges still in the inventory were built, which is 22.3% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1987, 5 years newer than the Louisiana average of 1982.
How Winn County compares with Louisiana's closest counties by inventory size
The 5 Louisiana counties nearest Winn County in number of bridges, with their condition splits. Its 16.4% Poor share is the 6th-lowest of these 6. Its average build year of 1987 against a peer-group mean of 1981 is 6 years newer.
Showing the 5 closest of 63 Louisiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Beauregard County | 221 | 13.6% | 78.3% | 8.1% | 1979 |
| Winn County (this page) | 220 | 55.5% | 28.2% | 16.4% | 1987 |
| Ascension County | 216 | 41.2% | 45.8% | 13% | 1981 |
| Terrebonne County | 215 | 42.3% | 47% | 10.7% | 1983 |
| Grant County | 209 | 41.6% | 42.6% | 15.8% | 1982 |
| Richland County | 207 | 21.3% | 67.6% | 11.1% | 1979 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Winn County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Winn County, both outside Louisiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside LA (220 bridges here).
- Bibb County, GA · 220 bridges
- Decatur County, IN · 220 bridges
- Dubois County, IN · 220 bridges
- Taylor County, IA · 220 bridges
Similar average build year
Nearest mean year-built outside LA (1987 here).
- St. Louis County, MO · avg 1987 · 912 bridges
- Ellis County, TX · avg 1987 · 691 bridges
- St. Louis County, MN · avg 1987 · 663 bridges
- Palm Beach County, FL · avg 1987 · 610 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (122)
US0084
GoodOver: COULEY CREEK
5.5 MI EAST OF LA 477, Winn, LA
Built 1997 Load: 43.5 t ADT: 2,963
US0084
GoodOver: WOLF CREEK
11.2 MI EAST OF LA 477, Winn, LA
Built 1998 Load: 43.5 t ADT: 2,963
US0084
GoodOver: PORT DE LUCE CREEK
3.0 MI EAST OF LA 1228, Winn, LA
Built 1997 Load: 43.5 t ADT: 5,495
US0084
GoodOver: DUGDEMONA RIVER RELIEF
0.69 MI EAST JCT. US 167, Winn, LA
Built 1996 Load: 43.5 t ADT: 4,317
US0084
GoodOver: SANDY CREEK
3.3 MI EAST OF LA 124, Winn, LA
Built 1998 Load: 43.5 t ADT: 891
LA0127
GoodOver: BIG CREEK
1.87 M. NW CALDWELL LINE, Winn, LA
Built 2002 Load: 44.5 t ADT: 314
LA0127
GoodOver: FLAT CREEK
4.01 M. NW CALDWELL LINE, Winn, LA
Built 2002 Load: 44.5 t ADT: 291
LA0500
GoodOver: KENNY CREEK
0.76 MI. EAST OF US 167, Winn, LA
Built 1998 Load: 44.7 t ADT: 220
US0167
GoodOver: CREOSOTE BRANCH
8.99 MI. NORTH OF LA 500, Winn, LA
Built 2006 Load: 45.0 t ADT: 15,576
LA1236
GoodOver: LITTLE KIESCHE CREEK
1.33 MI W OF LA 34, Winn, LA
Built 2016 Load: 46.3 t ADT: 825
LA1236
GoodOver: KIESCHE CREEK
0.34 MI W OF LA 34, Winn, LA
Built 2016 Load: 46.3 t ADT: 825
LA1236
GoodOver: UNNAMED CREEK
2.85 MILES EAST OF US 167, Winn, LA
Built 2015 Load: 46.3 t ADT: 825
LA1236
GoodOver: BRUSHY CREEK
0.09 MILES EAST OF US 167, Winn, LA
Built 2014 Load: 46.3 t ADT: 825
LA0034
GoodOver: REDLAND CREEK
0.6 MI N OF LA 471, Winn, LA
Built 2016 Load: 46.3 t ADT: 1,219
LA0034
GoodOver: IATT CREEK
0.2 MI E OF LA 471, Winn, LA
Built 2016 Load: 46.3 t ADT: 965
LA0126
GoodOver: CYPRESS CREEK
1.7 MI. E. of LA 1233, Winn, LA
Built 2019 Load: 55.1 t ADT: 310
LA0126
GoodOver: DRAINAGE DITCH
0.67 MILE EAST OF LA 127, Winn, LA
Built 1985 Load: 65.4 t ADT: 473
LA0127
GoodOver: CREEK
11.4 MI. NW CALDWELL LINE, Winn, LA
Built 2010 Load: 74.5 t ADT: 183
LA0127
GoodOver: CREEK
9.78 MI. NW CALDWELL LINE, Winn, LA
Built 2010 Load: 74.5 t ADT: 183
LA0499
GoodOver: DUG CREEK
2.55 MI N JCT LA 126, Winn, LA
Built 1996 Load: 74.5 t ADT: 114
LA0127
GoodOver: CREEK
3.12 MI NW CALDWELL LINE, Winn, LA
Built 2002 Load: 74.5 t ADT: 305
LA0127
GoodOver: TANYARD CREEK
6.65 MI. NW CALDWELL LINE, Winn, LA
Built 2002 Load: 74.5 t ADT: 183
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.